... Knocked down4.5 shelves Libarary series are available in single/dual upright structure bookshelf, magazine cabinet, blueprint cabinet, ... storage cabinet etc. Frame-type base made of steel, single and dual upright structure, adjustable story spacing, all detachable. Optional ... middle fender, and three, four ,five, six, seven storeyare available to be seleted. 5 levels single pillar double side storage ...